Why does the combustion air blower in the waste liquid incinerator first stabilize the outlet pressure using frequency conversion before adjusting the flow rate through the damper?
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Why does the combustion air blower in the waste liquid incinerator first stabilize the outlet pressure using frequency conversion before adjusting the flow rate through the damper? This process modifies the performance curve of the fan through an inverter (to maintain a stable outlet pressure), while also adjusting the characteristics of the ducting via dampers. Sometimes, the range of adjustment required for the air volume is quite large, possibly from 20% to 100%
Here, we use variable frequency control to regulate the flow rate, while the negative pressure of the entire system is controlled by the exhaust fan.
It is estimated that the owner’s unit doesn’t have an exhaust fan, just like a gas boiler. Therefore, variable frequency control of air pressure is required. It is mainly for safety reasons; if the wind pressure is high, the pressure inside the furnace also increases. This may cause tempering; if the exhaust pressure is already low, gas backflow will occur.